#include<stdio.h>
int main(void)
{
	short year, years_left;
	printf("Enter year for leap year check: ");
	scanf("%hd", &year);
	if (year < 0) {
		printf("Invalid year\n");
		return 1;
	}
	if (year % 4 == 0) 			/*No parentheses required*/
		printf("Year %hd is a leap year. \n"
			"Next leap year is after 4 years \n",year);
	else {
		years_left = 4 - year % 4; 	/*No parentheses required */
		printf("Year %hd is not a leap year. \n"
		"Next leap year is %hd. \n", year, year + years_left);
	}
	return 0;
}